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<?php trait toArray { public function toArray() { return get_object_vars($this); } public function fromArray(array $properties) { foreach ($properties as $key => $value) { if (method_exists($this, 'set' . ucfirst($key))) { $this->{'set' . ucfirst($key)}($value); } } } } interface FooInterface { public function toArray(); public function fromArray(array $properties); } class Foo implements FooInterface { use toArray; private $bar; private $baz; public function setBar($bar) { $this->bar = $bar; return $this; } public function setBaz($baz) { $this->baz = $baz; return $this; } } $foo = new Foo; $foo->fromArray(['bar' => 'boo', 'baz' => 'test']); $fooArray = $foo->toArray(); var_export($fooArray);